#include <REGX52.H>

void Delay1ms(unsigned int xms)		//@12.000MHz
{
	unsigned char i, j;
	while(xms)
	{
		xms--;
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
	}
	
}

void main(){
		P2=0xFE; // 1111 1110
		Delay1ms(500); 
		P2=0xFD; // 1111 1101
		Delay1ms(600);
		P2=0xFB;  // 1111 1011
		Delay1ms(700);
		P2=0xF7;  // 1111 0111
		Delay1ms(800);
		P2=0xEF;  // 1110 1111
		Delay1ms(900);
		P2=0xDF;  // 1101 1111
		Delay1ms(1000);
		P2=0xBF;  // 1011 1111
		Delay1ms(900);
		P2=0x7F;  // 0111 1111
		Delay1ms(800);
}